code: def test_o_len():
      obj = scope._test_foo()
      x, y = obj
      assert x.name == "getitem"
      assert x.pos_args[1]._obj == 0
      assert y.pos_args[1]._obj == 1
  
imports: from hyperopt.pyll import base
  from hyperopt.pyll.base import Literal, as_apply, Apply, dfs, scope, rec_eval, p0, Lambda, clone_merge
  from nose import SkipTest
  from nose.tools import assert_raises
  import numpy
label_desc: Use image node_id 14 for calling a global function with example usage: test_o_len() without return types